title: Lower operation voltage in dual-frequency cholesteric liquid crystals based on the thermodielectric effect.
abstract: Dual-frequency cholesteric liquid crystal (DFCLC) devices characteristically require high operation voltage, which hinders their further development in thin-film-transistor driving. Here we report on a lower-voltage switching method based on the thermodielectric effect. This technique entails applying a high-frequency voltage to occasion dielectric oscillation heating so to induce the increase in crossover frequency. The subsequent change in dielectric anisotropy of the DFCLC allows the switching, with a lower operation voltage, from the planar state to the focal conic or homeotropic state. The temperature rise incurred by the dielectric heating is described.
authors.forename: Yu-Cheng
authors.initials: YC
authors.lastname: Hsiao
authors.forename: Wei
authors.initials: W
authors.lastname: Lee